Commit | Line | Data |
---|---|---|
c93d08fa | 1 | /* |
ff45262a | 2 | * LP5521/LP5523/LP55231/LP5562 Common Driver |
c93d08fa MWK |
3 | * |
4 | * Copyright 2012 Texas Instruments | |
5 | * | |
6 | * Author: Milo(Woogyom) Kim <milo.kim@ti.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | * Derived from leds-lp5521.c, leds-lp5523.c | |
13 | */ | |
14 | ||
53b41922 | 15 | #include <linux/clk.h> |
a85908dd | 16 | #include <linux/delay.h> |
10c06d17 | 17 | #include <linux/firmware.h> |
c93d08fa MWK |
18 | #include <linux/i2c.h> |
19 | #include <linux/leds.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/platform_data/leds-lp55xx.h> | |
7542a04b | 22 | #include <linux/slab.h> |
c93d08fa MWK |
23 | |
24 | #include "leds-lp55xx-common.h" | |
25 | ||
53b41922 KM |
26 | /* External clock rate */ |
27 | #define LP55XX_CLK_32K 32768 | |
28 | ||
a6e4679a MWK |
29 | static struct lp55xx_led *cdev_to_lp55xx_led(struct led_classdev *cdev) |
30 | { | |
31 | return container_of(cdev, struct lp55xx_led, cdev); | |
32 | } | |
33 | ||
a96bfa13 MWK |
34 | static struct lp55xx_led *dev_to_lp55xx_led(struct device *dev) |
35 | { | |
36 | return cdev_to_lp55xx_led(dev_get_drvdata(dev)); | |
37 | } | |
38 | ||
48068d5d MWK |
39 | static void lp55xx_reset_device(struct lp55xx_chip *chip) |
40 | { | |
41 | struct lp55xx_device_config *cfg = chip->cfg; | |
42 | u8 addr = cfg->reset.addr; | |
43 | u8 val = cfg->reset.val; | |
44 | ||
45 | /* no error checking here because no ACK from the device after reset */ | |
46 | lp55xx_write(chip, addr, val); | |
47 | } | |
48 | ||
e3a700d8 MWK |
49 | static int lp55xx_detect_device(struct lp55xx_chip *chip) |
50 | { | |
51 | struct lp55xx_device_config *cfg = chip->cfg; | |
52 | u8 addr = cfg->enable.addr; | |
53 | u8 val = cfg->enable.val; | |
54 | int ret; | |
55 | ||
56 | ret = lp55xx_write(chip, addr, val); | |
57 | if (ret) | |
58 | return ret; | |
59 | ||
60 | usleep_range(1000, 2000); | |
61 | ||
62 | ret = lp55xx_read(chip, addr, &val); | |
63 | if (ret) | |
64 | return ret; | |
65 | ||
66 | if (val != cfg->enable.val) | |
67 | return -ENODEV; | |
68 | ||
69 | return 0; | |
70 | } | |
71 | ||
ffbdccdb MWK |
72 | static int lp55xx_post_init_device(struct lp55xx_chip *chip) |
73 | { | |
74 | struct lp55xx_device_config *cfg = chip->cfg; | |
75 | ||
76 | if (!cfg->post_init_device) | |
77 | return 0; | |
78 | ||
79 | return cfg->post_init_device(chip); | |
80 | } | |
81 | ||
a96bfa13 MWK |
82 | static ssize_t lp55xx_show_current(struct device *dev, |
83 | struct device_attribute *attr, | |
84 | char *buf) | |
85 | { | |
86 | struct lp55xx_led *led = dev_to_lp55xx_led(dev); | |
87 | ||
24d32128 | 88 | return scnprintf(buf, PAGE_SIZE, "%d\n", led->led_current); |
a96bfa13 MWK |
89 | } |
90 | ||
91 | static ssize_t lp55xx_store_current(struct device *dev, | |
92 | struct device_attribute *attr, | |
93 | const char *buf, size_t len) | |
94 | { | |
95 | struct lp55xx_led *led = dev_to_lp55xx_led(dev); | |
96 | struct lp55xx_chip *chip = led->chip; | |
97 | unsigned long curr; | |
98 | ||
99 | if (kstrtoul(buf, 0, &curr)) | |
100 | return -EINVAL; | |
101 | ||
102 | if (curr > led->max_current) | |
103 | return -EINVAL; | |
104 | ||
105 | if (!chip->cfg->set_led_current) | |
106 | return len; | |
107 | ||
108 | mutex_lock(&chip->lock); | |
109 | chip->cfg->set_led_current(led, (u8)curr); | |
110 | mutex_unlock(&chip->lock); | |
111 | ||
112 | return len; | |
113 | } | |
114 | ||
115 | static ssize_t lp55xx_show_max_current(struct device *dev, | |
116 | struct device_attribute *attr, | |
117 | char *buf) | |
118 | { | |
119 | struct lp55xx_led *led = dev_to_lp55xx_led(dev); | |
120 | ||
24d32128 | 121 | return scnprintf(buf, PAGE_SIZE, "%d\n", led->max_current); |
a96bfa13 MWK |
122 | } |
123 | ||
124 | static DEVICE_ATTR(led_current, S_IRUGO | S_IWUSR, lp55xx_show_current, | |
125 | lp55xx_store_current); | |
126 | static DEVICE_ATTR(max_current, S_IRUGO , lp55xx_show_max_current, NULL); | |
127 | ||
0e202346 | 128 | static struct attribute *lp55xx_led_attributes[] = { |
a96bfa13 MWK |
129 | &dev_attr_led_current.attr, |
130 | &dev_attr_max_current.attr, | |
0e202346 MWK |
131 | NULL, |
132 | }; | |
133 | ||
134 | static struct attribute_group lp55xx_led_attr_group = { | |
135 | .attrs = lp55xx_led_attributes | |
136 | }; | |
137 | ||
138 | static void lp55xx_set_brightness(struct led_classdev *cdev, | |
139 | enum led_brightness brightness) | |
140 | { | |
a6e4679a MWK |
141 | struct lp55xx_led *led = cdev_to_lp55xx_led(cdev); |
142 | ||
143 | led->brightness = (u8)brightness; | |
144 | schedule_work(&led->brightness_work); | |
0e202346 MWK |
145 | } |
146 | ||
9e9b3db1 MWK |
147 | static int lp55xx_init_led(struct lp55xx_led *led, |
148 | struct lp55xx_chip *chip, int chan) | |
149 | { | |
0e202346 MWK |
150 | struct lp55xx_platform_data *pdata = chip->pdata; |
151 | struct lp55xx_device_config *cfg = chip->cfg; | |
152 | struct device *dev = &chip->cl->dev; | |
153 | char name[32]; | |
154 | int ret; | |
155 | int max_channel = cfg->max_channel; | |
156 | ||
157 | if (chan >= max_channel) { | |
158 | dev_err(dev, "invalid channel: %d / %d\n", chan, max_channel); | |
159 | return -EINVAL; | |
160 | } | |
161 | ||
162 | if (pdata->led_config[chan].led_current == 0) | |
163 | return 0; | |
164 | ||
165 | led->led_current = pdata->led_config[chan].led_current; | |
166 | led->max_current = pdata->led_config[chan].max_current; | |
167 | led->chan_nr = pdata->led_config[chan].chan_nr; | |
168 | ||
169 | if (led->chan_nr >= max_channel) { | |
170 | dev_err(dev, "Use channel numbers between 0 and %d\n", | |
171 | max_channel - 1); | |
172 | return -EINVAL; | |
173 | } | |
174 | ||
175 | led->cdev.brightness_set = lp55xx_set_brightness; | |
176 | ||
177 | if (pdata->led_config[chan].name) { | |
178 | led->cdev.name = pdata->led_config[chan].name; | |
179 | } else { | |
180 | snprintf(name, sizeof(name), "%s:channel%d", | |
181 | pdata->label ? : chip->cl->name, chan); | |
182 | led->cdev.name = name; | |
183 | } | |
184 | ||
185 | /* | |
186 | * register led class device for each channel and | |
187 | * add device attributes | |
188 | */ | |
189 | ||
190 | ret = led_classdev_register(dev, &led->cdev); | |
191 | if (ret) { | |
192 | dev_err(dev, "led register err: %d\n", ret); | |
193 | return ret; | |
194 | } | |
195 | ||
196 | ret = sysfs_create_group(&led->cdev.dev->kobj, &lp55xx_led_attr_group); | |
197 | if (ret) { | |
198 | dev_err(dev, "led sysfs err: %d\n", ret); | |
199 | led_classdev_unregister(&led->cdev); | |
200 | return ret; | |
201 | } | |
202 | ||
9e9b3db1 MWK |
203 | return 0; |
204 | } | |
205 | ||
10c06d17 MWK |
206 | static void lp55xx_firmware_loaded(const struct firmware *fw, void *context) |
207 | { | |
208 | struct lp55xx_chip *chip = context; | |
209 | struct device *dev = &chip->cl->dev; | |
210 | ||
211 | if (!fw) { | |
212 | dev_err(dev, "firmware request failed\n"); | |
213 | goto out; | |
214 | } | |
215 | ||
216 | /* handling firmware data is chip dependent */ | |
217 | mutex_lock(&chip->lock); | |
218 | ||
219 | chip->fw = fw; | |
220 | if (chip->cfg->firmware_cb) | |
221 | chip->cfg->firmware_cb(chip); | |
222 | ||
223 | mutex_unlock(&chip->lock); | |
224 | ||
225 | out: | |
226 | /* firmware should be released for other channel use */ | |
227 | release_firmware(chip->fw); | |
228 | } | |
229 | ||
230 | static int lp55xx_request_firmware(struct lp55xx_chip *chip) | |
231 | { | |
232 | const char *name = chip->cl->name; | |
233 | struct device *dev = &chip->cl->dev; | |
234 | ||
235 | return request_firmware_nowait(THIS_MODULE, true, name, dev, | |
236 | GFP_KERNEL, chip, lp55xx_firmware_loaded); | |
237 | } | |
238 | ||
239 | static ssize_t lp55xx_show_engine_select(struct device *dev, | |
240 | struct device_attribute *attr, | |
241 | char *buf) | |
242 | { | |
243 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
244 | struct lp55xx_chip *chip = led->chip; | |
245 | ||
246 | return sprintf(buf, "%d\n", chip->engine_idx); | |
247 | } | |
248 | ||
249 | static ssize_t lp55xx_store_engine_select(struct device *dev, | |
250 | struct device_attribute *attr, | |
251 | const char *buf, size_t len) | |
252 | { | |
253 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
254 | struct lp55xx_chip *chip = led->chip; | |
255 | unsigned long val; | |
256 | int ret; | |
257 | ||
258 | if (kstrtoul(buf, 0, &val)) | |
259 | return -EINVAL; | |
260 | ||
261 | /* select the engine to be run */ | |
262 | ||
263 | switch (val) { | |
264 | case LP55XX_ENGINE_1: | |
265 | case LP55XX_ENGINE_2: | |
266 | case LP55XX_ENGINE_3: | |
267 | mutex_lock(&chip->lock); | |
268 | chip->engine_idx = val; | |
269 | ret = lp55xx_request_firmware(chip); | |
270 | mutex_unlock(&chip->lock); | |
271 | break; | |
272 | default: | |
273 | dev_err(dev, "%lu: invalid engine index. (1, 2, 3)\n", val); | |
274 | return -EINVAL; | |
275 | } | |
276 | ||
277 | if (ret) { | |
278 | dev_err(dev, "request firmware err: %d\n", ret); | |
279 | return ret; | |
280 | } | |
281 | ||
282 | return len; | |
283 | } | |
284 | ||
285 | static inline void lp55xx_run_engine(struct lp55xx_chip *chip, bool start) | |
286 | { | |
287 | if (chip->cfg->run_engine) | |
288 | chip->cfg->run_engine(chip, start); | |
289 | } | |
290 | ||
291 | static ssize_t lp55xx_store_engine_run(struct device *dev, | |
292 | struct device_attribute *attr, | |
293 | const char *buf, size_t len) | |
294 | { | |
295 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
296 | struct lp55xx_chip *chip = led->chip; | |
297 | unsigned long val; | |
298 | ||
299 | if (kstrtoul(buf, 0, &val)) | |
300 | return -EINVAL; | |
301 | ||
302 | /* run or stop the selected engine */ | |
303 | ||
304 | if (val <= 0) { | |
305 | lp55xx_run_engine(chip, false); | |
306 | return len; | |
307 | } | |
308 | ||
309 | mutex_lock(&chip->lock); | |
310 | lp55xx_run_engine(chip, true); | |
311 | mutex_unlock(&chip->lock); | |
312 | ||
313 | return len; | |
314 | } | |
315 | ||
316 | static DEVICE_ATTR(select_engine, S_IRUGO | S_IWUSR, | |
317 | lp55xx_show_engine_select, lp55xx_store_engine_select); | |
318 | static DEVICE_ATTR(run_engine, S_IWUSR, NULL, lp55xx_store_engine_run); | |
319 | ||
b3b6f811 | 320 | static struct attribute *lp55xx_engine_attributes[] = { |
10c06d17 MWK |
321 | &dev_attr_select_engine.attr, |
322 | &dev_attr_run_engine.attr, | |
b3b6f811 MWK |
323 | NULL, |
324 | }; | |
325 | ||
326 | static const struct attribute_group lp55xx_engine_attr_group = { | |
327 | .attrs = lp55xx_engine_attributes, | |
328 | }; | |
329 | ||
c93d08fa MWK |
330 | int lp55xx_write(struct lp55xx_chip *chip, u8 reg, u8 val) |
331 | { | |
332 | return i2c_smbus_write_byte_data(chip->cl, reg, val); | |
333 | } | |
334 | EXPORT_SYMBOL_GPL(lp55xx_write); | |
335 | ||
336 | int lp55xx_read(struct lp55xx_chip *chip, u8 reg, u8 *val) | |
337 | { | |
338 | s32 ret; | |
339 | ||
340 | ret = i2c_smbus_read_byte_data(chip->cl, reg); | |
341 | if (ret < 0) | |
342 | return ret; | |
343 | ||
344 | *val = ret; | |
345 | return 0; | |
346 | } | |
347 | EXPORT_SYMBOL_GPL(lp55xx_read); | |
348 | ||
349 | int lp55xx_update_bits(struct lp55xx_chip *chip, u8 reg, u8 mask, u8 val) | |
350 | { | |
351 | int ret; | |
352 | u8 tmp; | |
353 | ||
354 | ret = lp55xx_read(chip, reg, &tmp); | |
355 | if (ret) | |
356 | return ret; | |
357 | ||
358 | tmp &= ~mask; | |
359 | tmp |= val & mask; | |
360 | ||
361 | return lp55xx_write(chip, reg, tmp); | |
362 | } | |
363 | EXPORT_SYMBOL_GPL(lp55xx_update_bits); | |
364 | ||
53b41922 KM |
365 | bool lp55xx_is_extclk_used(struct lp55xx_chip *chip) |
366 | { | |
367 | struct clk *clk; | |
368 | int err; | |
369 | ||
370 | clk = devm_clk_get(&chip->cl->dev, "32k_clk"); | |
371 | if (IS_ERR(clk)) | |
372 | goto use_internal_clk; | |
373 | ||
374 | err = clk_prepare_enable(clk); | |
375 | if (err) | |
376 | goto use_internal_clk; | |
377 | ||
378 | if (clk_get_rate(clk) != LP55XX_CLK_32K) { | |
379 | clk_disable_unprepare(clk); | |
380 | goto use_internal_clk; | |
381 | } | |
382 | ||
383 | dev_info(&chip->cl->dev, "%dHz external clock used\n", LP55XX_CLK_32K); | |
384 | ||
385 | chip->clk = clk; | |
386 | return true; | |
387 | ||
388 | use_internal_clk: | |
389 | dev_info(&chip->cl->dev, "internal clock used\n"); | |
390 | return false; | |
391 | } | |
392 | EXPORT_SYMBOL_GPL(lp55xx_is_extclk_used); | |
393 | ||
a85908dd MWK |
394 | int lp55xx_init_device(struct lp55xx_chip *chip) |
395 | { | |
396 | struct lp55xx_platform_data *pdata; | |
48068d5d | 397 | struct lp55xx_device_config *cfg; |
a85908dd MWK |
398 | struct device *dev = &chip->cl->dev; |
399 | int ret = 0; | |
400 | ||
401 | WARN_ON(!chip); | |
402 | ||
403 | pdata = chip->pdata; | |
48068d5d | 404 | cfg = chip->cfg; |
a85908dd | 405 | |
48068d5d | 406 | if (!pdata || !cfg) |
a85908dd MWK |
407 | return -EINVAL; |
408 | ||
409 | if (pdata->setup_resources) { | |
410 | ret = pdata->setup_resources(); | |
411 | if (ret < 0) { | |
412 | dev_err(dev, "setup resoure err: %d\n", ret); | |
413 | goto err; | |
414 | } | |
415 | } | |
416 | ||
417 | if (pdata->enable) { | |
418 | pdata->enable(0); | |
419 | usleep_range(1000, 2000); /* Keep enable down at least 1ms */ | |
420 | pdata->enable(1); | |
421 | usleep_range(1000, 2000); /* 500us abs min. */ | |
422 | } | |
423 | ||
48068d5d MWK |
424 | lp55xx_reset_device(chip); |
425 | ||
426 | /* | |
427 | * Exact value is not available. 10 - 20ms | |
428 | * appears to be enough for reset. | |
429 | */ | |
430 | usleep_range(10000, 20000); | |
431 | ||
e3a700d8 MWK |
432 | ret = lp55xx_detect_device(chip); |
433 | if (ret) { | |
434 | dev_err(dev, "device detection err: %d\n", ret); | |
435 | goto err; | |
436 | } | |
437 | ||
ffbdccdb MWK |
438 | /* chip specific initialization */ |
439 | ret = lp55xx_post_init_device(chip); | |
22ebeb48 MWK |
440 | if (ret) { |
441 | dev_err(dev, "post init device err: %d\n", ret); | |
442 | goto err_post_init; | |
443 | } | |
ffbdccdb MWK |
444 | |
445 | return 0; | |
446 | ||
22ebeb48 | 447 | err_post_init: |
6ce61762 MWK |
448 | lp55xx_deinit_device(chip); |
449 | err: | |
450 | return ret; | |
451 | } | |
452 | EXPORT_SYMBOL_GPL(lp55xx_init_device); | |
453 | ||
454 | void lp55xx_deinit_device(struct lp55xx_chip *chip) | |
455 | { | |
456 | struct lp55xx_platform_data *pdata = chip->pdata; | |
457 | ||
53b41922 KM |
458 | if (chip->clk) |
459 | clk_disable_unprepare(chip->clk); | |
460 | ||
22ebeb48 MWK |
461 | if (pdata->enable) |
462 | pdata->enable(0); | |
6ce61762 | 463 | |
22ebeb48 MWK |
464 | if (pdata->release_resources) |
465 | pdata->release_resources(); | |
a85908dd | 466 | } |
6ce61762 | 467 | EXPORT_SYMBOL_GPL(lp55xx_deinit_device); |
a85908dd | 468 | |
9e9b3db1 MWK |
469 | int lp55xx_register_leds(struct lp55xx_led *led, struct lp55xx_chip *chip) |
470 | { | |
471 | struct lp55xx_platform_data *pdata = chip->pdata; | |
472 | struct lp55xx_device_config *cfg = chip->cfg; | |
473 | int num_channels = pdata->num_channels; | |
474 | struct lp55xx_led *each; | |
475 | u8 led_current; | |
476 | int ret; | |
477 | int i; | |
478 | ||
479 | if (!cfg->brightness_work_fn) { | |
480 | dev_err(&chip->cl->dev, "empty brightness configuration\n"); | |
481 | return -EINVAL; | |
482 | } | |
483 | ||
484 | for (i = 0; i < num_channels; i++) { | |
485 | ||
486 | /* do not initialize channels that are not connected */ | |
487 | if (pdata->led_config[i].led_current == 0) | |
488 | continue; | |
489 | ||
490 | led_current = pdata->led_config[i].led_current; | |
491 | each = led + i; | |
492 | ret = lp55xx_init_led(each, chip, i); | |
493 | if (ret) | |
494 | goto err_init_led; | |
495 | ||
496 | INIT_WORK(&each->brightness_work, cfg->brightness_work_fn); | |
497 | ||
498 | chip->num_leds++; | |
499 | each->chip = chip; | |
500 | ||
501 | /* setting led current at each channel */ | |
502 | if (cfg->set_led_current) | |
503 | cfg->set_led_current(each, led_current); | |
504 | } | |
505 | ||
506 | return 0; | |
507 | ||
508 | err_init_led: | |
d9067d28 | 509 | lp55xx_unregister_leds(led, chip); |
9e9b3db1 MWK |
510 | return ret; |
511 | } | |
512 | EXPORT_SYMBOL_GPL(lp55xx_register_leds); | |
513 | ||
c3a68ebf MWK |
514 | void lp55xx_unregister_leds(struct lp55xx_led *led, struct lp55xx_chip *chip) |
515 | { | |
516 | int i; | |
517 | struct lp55xx_led *each; | |
c3a68ebf MWK |
518 | |
519 | for (i = 0; i < chip->num_leds; i++) { | |
520 | each = led + i; | |
c3a68ebf MWK |
521 | led_classdev_unregister(&each->cdev); |
522 | flush_work(&each->brightness_work); | |
523 | } | |
524 | } | |
525 | EXPORT_SYMBOL_GPL(lp55xx_unregister_leds); | |
526 | ||
b3b6f811 MWK |
527 | int lp55xx_register_sysfs(struct lp55xx_chip *chip) |
528 | { | |
529 | struct device *dev = &chip->cl->dev; | |
240085e2 MWK |
530 | struct lp55xx_device_config *cfg = chip->cfg; |
531 | int ret; | |
532 | ||
533 | if (!cfg->run_engine || !cfg->firmware_cb) | |
534 | goto dev_specific_attrs; | |
535 | ||
536 | ret = sysfs_create_group(&dev->kobj, &lp55xx_engine_attr_group); | |
537 | if (ret) | |
538 | return ret; | |
b3b6f811 | 539 | |
240085e2 MWK |
540 | dev_specific_attrs: |
541 | return cfg->dev_attr_group ? | |
542 | sysfs_create_group(&dev->kobj, cfg->dev_attr_group) : 0; | |
b3b6f811 MWK |
543 | } |
544 | EXPORT_SYMBOL_GPL(lp55xx_register_sysfs); | |
545 | ||
ba6fa846 MWK |
546 | void lp55xx_unregister_sysfs(struct lp55xx_chip *chip) |
547 | { | |
548 | struct device *dev = &chip->cl->dev; | |
549 | struct lp55xx_device_config *cfg = chip->cfg; | |
550 | ||
551 | if (cfg->dev_attr_group) | |
552 | sysfs_remove_group(&dev->kobj, cfg->dev_attr_group); | |
553 | ||
554 | sysfs_remove_group(&dev->kobj, &lp55xx_engine_attr_group); | |
555 | } | |
556 | EXPORT_SYMBOL_GPL(lp55xx_unregister_sysfs); | |
557 | ||
7542a04b LW |
558 | int lp55xx_of_populate_pdata(struct device *dev, struct device_node *np) |
559 | { | |
2dac9128 | 560 | struct device_node *child; |
7542a04b | 561 | struct lp55xx_platform_data *pdata; |
2dac9128 KM |
562 | struct lp55xx_led_config *cfg; |
563 | int num_channels; | |
564 | int i = 0; | |
7542a04b LW |
565 | |
566 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
567 | if (!pdata) | |
568 | return -ENOMEM; | |
569 | ||
2dac9128 KM |
570 | num_channels = of_get_child_count(np); |
571 | if (num_channels == 0) { | |
572 | dev_err(dev, "no LED channels\n"); | |
573 | return -EINVAL; | |
574 | } | |
7542a04b | 575 | |
2dac9128 KM |
576 | cfg = devm_kzalloc(dev, sizeof(*cfg) * num_channels, GFP_KERNEL); |
577 | if (!cfg) | |
7542a04b LW |
578 | return -ENOMEM; |
579 | ||
2dac9128 KM |
580 | pdata->led_config = &cfg[0]; |
581 | pdata->num_channels = num_channels; | |
582 | ||
583 | for_each_child_of_node(np, child) { | |
584 | cfg[i].chan_nr = i; | |
585 | ||
586 | of_property_read_string(child, "chan-name", &cfg[i].name); | |
587 | of_property_read_u8(child, "led-cur", &cfg[i].led_current); | |
588 | of_property_read_u8(child, "max-cur", &cfg[i].max_current); | |
589 | ||
590 | i++; | |
7542a04b | 591 | } |
2dac9128 KM |
592 | |
593 | of_property_read_string(np, "label", &pdata->label); | |
594 | of_property_read_u8(np, "clock-mode", &pdata->clock_mode); | |
595 | ||
33b3a561 KM |
596 | /* LP8501 specific */ |
597 | of_property_read_u8(np, "pwr-sel", (u8 *)&pdata->pwr_sel); | |
598 | ||
7542a04b LW |
599 | dev->platform_data = pdata; |
600 | ||
601 | return 0; | |
602 | } | |
603 | EXPORT_SYMBOL_GPL(lp55xx_of_populate_pdata); | |
604 | ||
c93d08fa MWK |
605 | MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>"); |
606 | MODULE_DESCRIPTION("LP55xx Common Driver"); | |
607 | MODULE_LICENSE("GPL"); |